Stove for automatic chokes



Nov. 18, 1952 H. A. BOLLER 2,618,251

STOVE FOR AUTOMATIC CHOKES Filed Aug. 23, 1950 INVENTOR. I HENRY A.BOLLER ATTORNEY Patented Nov. 18, 1952 STOVE FOR AUTOMATIC CHOKES HenryA. Boller, Pontiac, Mich assignor to Carter Carburetor Corporation, St.Louis, Mo., a corporation of Delaware Application August 23, 1950,Serial No. 181,062

3 Claims.

This invention relates to heating devices for use in connection withthermostatic controls such. for instance, as automatic choke controlsfor internal combustion engines.

Where an automatic choke control of the type covered in Coffey PatentNo. 2,085,351, for instance, is used with an automotive engine, it isnecessary to lead hot air from the vicinity of the engine to thethermostatic control device mounted on the carburetor air horn so thatthis device may accurately reflect the engine temperature. Thepositioning and mounting of the stove device present some difficulty,particularly, where the engine and manifolding are not originallydesigned to accommodate such a part.

Accordingly, it is the main object of the present invention to provide anovel air heating stove of the above type together with means formountingthe same on the exhaust manifold.

This object and other more detailed objects hereafter appearing areattained by the structure illustrated in the accompanying drawing inwhich Fig. 1 is a perspective view showing portions of an automotiveengine and manifolding systems, portions being broken away for clearerillustration.

Fig. 2 is a side elevation, enlarged, showing one of the exhaustmanifold branches with the novel stove mounted thereon.

Fig. 3 is a vertical, transverse, central section through the structurein Fig. 2.

Fig. 4 is a section taken on the inclined line 4--4 of Fig. 3.

The engine in Fig. 1 is of the valve in head type and has a cylinderblock 6 with a row of alternating intake and exhaust ports (not shown)along the'front side to which lead branches 1 and 8 of intake manifold 9and elbow branches I and II of exhaust manifold l2. These manifoldsmerge centrally in a well-known hot spot construction I3 having abolting flange M on its upper surface to which is attached a carburetor,generally indicated at [5. The carburetor has an automatic choke controlincluding a thermostat (not shown) mounted in a housing I6 on the sideof air horn portion ll of the carburetor barrel. Housing I6 is connectedby a hot air tube I8 to a stove l9 mounted on branch I I of exhaustmanifold l2.

This stove, as shown in greater detail in the remaining figures, isformed of a generally cupshaped, sheet metal member. The side portions20 of the member closely hug the side walls of manifold branch II andthe middle portion 2! is bowed outwardly to formv a chamber 22 which hasa bottom opening 23 for admission of cool air. The heated air isdischarged through an opening 24 to which is connected tube I8 leadingto the thermostat housing.

The stove also has laterally projecting tangs 25 which rest upon boltinglugs 26 projecting laterally from the exhaust manifold branch. Adjacentpairs of these bolting lugs are secured to the cylinder block by meansof a stud bolt 21 and bridging clamp 28, as best shown in Fig. 1. Tangs25 on the stove are inserted between manifold lugs 26 and these bridgingclamps for securing the stove firmly in position.

Thus, this stove may be readily mounted upon a. manifold of the typeshown without the necessity of any drilling or tapping thereof and doesnot in any other Way affect the manifold. The exclusive use of allmodifications as come within the scope of the appended claims iscontemplated.

I claim:

1. In combination with an internal combustion engine having manifoldingwith branches disposed side by side and bolting members each clamping apair of adjacent branches in position, a tube for supplying warm air,and a stove connected to said tube and comprising a member of sheetmaterial laid against one of said branches and forming an air heatingchamber therewith, said chamber having substantially greater capacitythan a corresponding length of said tube and said member having openingsfor admission of air to and discharge of the same from said chamber andhaving tangs underlying said bolting members for securing the member inposition.

elbow and bolting lugs for attachment to an engine block, an air heatingstove comprising a sheet metal cup applied over said elbow with its sideportions closely fitting the same and its center portion bulgedoutwardly therefrom to form an air chamber, openings in said bowedportion for admission of cool air and for discharge of warm air, andlateral tangs overlying said bolting lugs for attachment therewith to anengine to secure said stove in position.

3. In combination with an internal combustion engine having athermostatic control, a cylinder block with exhaust and intake portsarranged side by side, manifolding with branches leading to said ports,bolting lugs on said branches, and bolting clamps between pairs ofadjacent lugs, an air heating stove comprising 3 4 a sheet metal cupapplied inverted to one of said branches with its middle portion spacedFEFERENCES CITED therefrom t form a heating chamber with Open- Thefoliowing references are of record in the ings for admission of cool airand discharge of file of thls patent:

heated air, and with lateral tangs overlying the 5 UNITED STATES PATENTSbolting lugs on said last-mentioned branch for attachment therewith tothe engine, and a hot g l A g air connection between said stove and saidther- 1 Ben i 1924 mostatic control.

HENRY A. BOLLER. 1o

